Dear friends, let us love one another, for love comes from God. Everyone who loves has been born of God and knows God.
(NIV)

Beloved, let us love one another, for love is (springs) from God; and he who loves [his fellowmen] is begotten (born) of God and is coming [progressively] to know and understand God [to perceive and recognize and get a better and clearer knowledge of Him].
(AMP)

Beloved, let us love one another: for love is of God; and every one that loveth is born of God, and knoweth God.
(KJV)